Filter



3 Sheets Sheet 1. J. A. BOWDEN.

FILTER,

Patented June 3, 1890.

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(No Model.)

(No Model.) 3 Sheets-Sheet 2.

J. A. BOWDEN.

FILTER.

110,429,112. I Patented June 3, 1890.

1, A Flq- (.NoModeL) 3 sheets-sheen 3,

J. A. BOWDEN. FILTER.

No. 429,112. Patented June 3, 1890.

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UNITED STATES PATENT OFFICE.

JUNIUS A. BOWDEN, OF DETROIT, MICHIGAN.

FILTER.

SPECIFICATION forming part of Letters Patent No. 429,112, dated J' une3, 1890.

Application iiled August 17, 1889. Serial No. 321,058. (No model.)

T0 all whom it may concern:

Be it known that I, J UNIUs A. BowDEN, a citizen of the United States,residing at Detroit, county of lVayne, State of Michigan, have inventeda certain new and useful Improvementin Filters; and I declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same, reference being had to the accompanying drawings,which form a part of this specification.

My invention is designed to produce a iilter which may be cheaplyconstructed and yet durable and effective in operation; and it consists,essentially, of a tank of the desired size suitably divided into twocompartments, one above the other, each compartment provided Withsuitable filtering material and suitable connections, whereby the waterto be liltered after passing through one compartment will be passedthrough the other.

My invention also contemplates suitable connections whereby eachcompartment can be cleaned independent of the other, and in other novelfeatures of construction hereinafter described and claimed.

In the drawings,- Figure 1 is a plan view of my ilter. Fig. 2 is avertical section of the same. Fig. 3 is a vertical section of avariation, showing the apparatus when constructed on a larger scale.Fig. 4t is a plan View of the upper compartment on the line a: :C ofFig. 3 Fig. 5 is a plan .view of the lower compartment on the line y yof Fig. 3.

In carrying out my invention, A represents the upper chamber, and B thelower chamber, of my filter.

C represents the filtering material.

.D is the main supply-pipe controlled by the valve (Z.

E is the inlet-pipe of the upper chamber, controlled by the valve e, andE the inletpipe of the lower chamber, cont-rolled by the valve c.

F is the outlet from the upper chamber of the cleansing-water after ithas passed through the iilter-bed, and is controlled by the valve f, andF f are the corresponding outlet and valve for the lower chamber.

G is the outlet from the upper chamber to the lower, and is controlledby the valve g.

H is a cone-shaped im perforate wall or diaphragm supported clear of thebottom of the compartment by a perforated screen 7L, and, if desired, afiner perforated screen 7L may be placed adjacent to the iirst. One ormore of these diaphragms are placed in each compartment, and above andaround them is located the filtering material.

I is a pipe openinginto the upper compartment beneath the diaphragm andgoverned by the valve t'. This pipe may be used either for a drain fromthe upper compartment when it is being used alone, or it may be used asan inlet-pipe when the upper compartment is being cleaned. p

J is the corresponding outlet for the lower compartment, and may also beused as the inlet when the compartment is being cleaned. It is governedby the valves jj.

I will now explain the operation of my filter. All valves except e g andj are closed. NVater to be filtered is discharged at E. It passesthrough the iltering-bed O of the upper chamber, through the screens hh', through the pipe G, through the filtering-bed of the lower chamberand the screens 7L h', and off through the outlet J. To clean the uppercompartment the valves e g are closed and the valves i f opened. Thewaterunder pressure is then discharged into the compartment under thediaphragm and passes through the screens and up through the filteringmaterial. The water as it rises above the edge of the diaphragm willcarry more orless of the filtering material, and as this is carried upnew material will slide down the incline to till the space, and acirculation is thus obtained, whereby the material is thoroughlycleaned. The water, after passing through the iilterin gbed, is carriedoil' through the outlet F. The lower compartment is cleaned in a similarmanner; but, being preferably larger than the upper one, it is sometimesnecessary to have a means for loosening the filtering material above thediaphragm in order to have it circulate properly. To do this I providethe perforated pipe K, controlled by the valve 7c, and by discharging aquantity of water into the center of the bed by means of this pipe thewater issuing from beneath the diaphragm will cause the bed to circulateproperly while being cleaned.

IOO

In Figs. 3, 4, and 5 I have illustrated my invention in connection witha larger apparatus. In these large iilters a single diaphragm in acompartment would not be sufiieient. I therefore provide the centerconical diaphragm Il, and surround this by a diaphragm in the shape of aconical ring l-I and support it by the screens. The pipes I and .I maythen be provided with branches I J', extending to the different pointsunder the outer diaphragm, whereby the water for cleansing is dischargedinto the bed from a large number of points. So, also, a series of theloosening-pipes K may be provided, if desired.

Of course, instead ofthe conical-shaped diaphragms which form twoinclined surfaces, I might make a single inclined diaphragm and soarrange the inlet-pipe that the Water for cleansing the bed will bedischarged at the base of the incline. This would of course be theequivalent of the double incline or coneshaped diaphragm and would becontemplated by my invention. So, also, for a very small filter onecompartment would be sufficient, and I do not care to limit myself to aconstruction in which there are two compartments, although the latterform is preferable.

lVhat I claim is l. In a filter, the combination, with a suitablefiller-bed through which the water is passed, of an inclined imperforatewall or diaphragm beneath said bed and a water-inlet pipe locatedadjacent to the base of the inicline, whereby a discharge of water underpressure into the bed at the base of the ineline will create acirculation of the material composing the bed, substantially asdescribed.

2. A filter consisting of an upper and lower compartment, each having abottoni wall, a filter-bed in each compartment., inlet and outlet pipesto each compartment, a conical wall or diaphragm arranged in eachcompartment and supported above the bottom wall thereof below thefilter-bed, and water-inlet pipes which respectively discharge waterbeneath the conical walls or diaphragms for cleaning the filter-beds,substantially as described.

In a filter, the combination, with the liltering-bed, an inclineddiaphragm or diaphragms located beneath said bed, and waterinlet pipeslocated beneath said diaphragins,

of loosening-pipes K, located in the bed abovel the diaphragms,substantially as described. In testimony whereof I sign thisspecification in the presence of two witnesses.

`JUNIUS A. BOWDEN.

Witnesses:

WM. M. STEUART, W. H. CHAMBERLIN.

